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From st...@apache.org
Subject svn commit: r805483 - in /hadoop/hbase/branches/0.19: CHANGES.txt conf/hbase-default.xml
Date Tue, 18 Aug 2009 16:28:47 GMT
Author: stack
Date: Tue Aug 18 16:28:47 2009
New Revision: 805483

URL: http://svn.apache.org/viewvc?rev=805483&view=rev
Log:
HBASE-1771 PE sequentialWrite is 7x slower because of MemStoreFlusher#checkStoreFileCount

Modified:
    hadoop/hbase/branches/0.19/CHANGES.txt
    hadoop/hbase/branches/0.19/conf/hbase-default.xml

Modified: hadoop/hbase/branches/0.19/CHANGES.txt
URL: http://svn.apache.org/viewvc/hadoop/hbase/branches/0.19/CHANGES.txt?rev=805483&r1=805482&r2=805483&view=diff
==============================================================================
--- hadoop/hbase/branches/0.19/CHANGES.txt (original)
+++ hadoop/hbase/branches/0.19/CHANGES.txt Tue Aug 18 16:28:47 2009
@@ -35,6 +35,8 @@
   IMPROVEMENTS
    HBASE-1722  Add support for exporting HBase metrics via JMX
                (Gary Helmling via Stack)
+   HBASE-1771  PE sequentialWrite is 7x slower because of
+               MemStoreFlusher#checkStoreFileCount
 
 Release 0.19.3 - May 27th, 2009
   BUG FIXES

Modified: hadoop/hbase/branches/0.19/conf/hbase-default.xml
URL: http://svn.apache.org/viewvc/hadoop/hbase/branches/0.19/conf/hbase-default.xml?rev=805483&r1=805482&r2=805483&view=diff
==============================================================================
--- hadoop/hbase/branches/0.19/conf/hbase-default.xml (original)
+++ hadoop/hbase/branches/0.19/conf/hbase-default.xml Tue Aug 18 16:28:47 2009
@@ -292,6 +292,26 @@
     </description>
   </property>
   <property>
+    <name>hbase.hstore.blockingStoreFiles</name>
+    <value>7</value>
+    <description>
+    If more than this number of StoreFiles in any one Store
+    (one StoreFile is written per flush of MemStore) then updates are
+    blocked for this HRegion until a compaction is completed, or
+    until hbase.hstore.blockingWaitTime has been exceeded.
+    </description>
+  </property>
+  <property>
+    <name>hbase.hstore.blockingWaitTime</name>
+    <value>90000</value>
+    <description>
+    The time an HRegion will block updates for after hitting the StoreFile
+    limit defined by hbase.hstore.blockingStoreFiles.
+    After this time has elapsed, the HRegion will stop blocking updates even
+    if a compaction has not been completed.  Default: 90 seconds.
+    </description>
+  </property>
+  <property>
     <name>hbase.hstore.compaction.max</name>
     <value>10</value>
     <description>Max number of HStoreFiles to compact per 'minor' compaction.



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